|A friendly and intelligent approach to data retrieval in a multimedia DBMS - Keim, Daniel A.;Kim, Kyung-Chang.;Lum, Vincent Y.|
Title from cover
Keywords: DATA BASES
|Clustering, concurrency control, crash recovery, garbage collection, and security in object-oriented database management systems - de Paula, Everton, G.;Nelson, Michael L.|
Title from cover
Keywords: DATA BASES
|Exploiting captions for access to multimedia databases - Rowe, Neil C.;Guglielmo, Eugene J.|
Keywords: LABELS; DATA BASES
|Automated detection of naming conflicts in schema integration : experiments with quiddities* - Bhargava, H. K. (Hemant K.);Beyer, Renae M.|
Title from cover
Keywords: SEMANTICS; DATA BASES; INTEGRATION
|Techniques for multiple database integration - Whitaker, Barron D|
Thesis advisor, C. Thomas Wu
Keywords: DATA BASES; INTEGRATED SYSTEMS
|Exploiting captions in retrieval of multimedia data - Rowe, Neil C.;Guglielmo, Eugene J.|
Title from cover
Keywords: DATA BASES; NATURAL LANGUAGE
|The Aeroacoustics of Slowly Diverging Supersonic Jets - Goldstein, M. E.|
This paper is concerned with utilizing the acoustic analogy approach to predict the sound from unheated supersonic jets. Previous attempts have been unsuccessful at making such predictions over the Mach number range of practical interest. The present paper, therefore, focuses on implementing the necessary refinements needed to accomplish this objective. The important effects influencing peak supersonic noise turn out to be source convection, mean flow refraction, mean flow amplification, and sou...
Keywords: DATA BASES; REDUNDANCY; CHANNELS; PATENTS
|Towards intelligent data retrieval in mulitmedia [i.e. multimedia] databases - Kim, Kyung-Chang.;Lum, Vincent Y.|
Title from cover
Keywords: INFORMATION RETRIEVAL; MEDIA; DATA BASES
|Cross model access in the multi-lingual, multi-model database management system. - Anastasopoulos, Achilles.|
Thesis advisor, C. Thomas Wu
Keywords: DATA BASES; DATA MANAGEMENT; COMPATIBILITY
|On the feasibility of creating a comparable database for nonrecurring cost analysis under dual source competition - Boger, Dan C.;Liao, Shu S.|
Keywords: COST MODELS; SYSTEMS ENGINEERING; DATA BASES
|A comparison of password techniques for multilevel authentication mechanisms - Zviran, Moshe.Haga, William James.|
Keywords: DATA BASES.DATA PROCESSING SECURITY.INFORMATION SYSTEMS
|The NPS Platform Foundation - Bailey, Michael P.|
Keywords: DATA BASES; PLATFORMS; MILITARY TACTICS; COMPUTERIZED SIMULATION
|A Graphical Database Interface for a Mulitmedia [i.e. Multimedia] DBMS - Keim, Daniel A.;Lum, Vincent Y.|
Title from cover
Keywords: DATA BASES; MAN COMPUTER INTERFACE; COMPUTER GRAPHICS
|Robot wars simulation - Jones, Doreen M|
Thesis advisors, Gordon Schacher, Donald P. Brutzman
Keywords: DATA BASES; COMPUTERIZED SIMULATION; ROBOTS; COMPUTER GRAPHICS
|A design management and job assignment system - Badr, Salah M.;Berzinbs, Valdis Andris.|
Keywords: DATA BASES; JOB ANALYSIS; COMPUTER AIDED DESIGN
|Space Station Environmental Control and Life Support Systems: An Update on Waste Water Reclamation - Ferner, Kathleen M|
Since the mid-1980's, work has been ongoing In the development of the various environmental control and life support systems (ECLSS) for the space station. Part of this effort has been focused on the development of a new subsystem to reclaim waste water that had not been previously required for shuttle missions. Because of the extended manned missions proposed, reclamation of waste water becomes imperative to avoid the weight penalties associated with resupplying a crew's entire water needs for ...
Keywords: AERONAUTICAL ENGINEERING; BIBLIOGRAPHIES; DATA BASES; DOCUMENTATION
|NASA's Upper Atmosphere Research Program (UARP) and Atmospheric Chemistry Modeling and Analysis Program (ACMAP): Research Summaries 1997-1999 - Kurylo, M. J.|
Under the mandate contained in the FY 1976 NASA Authorization Act, the National Aeronautics and Space Administration (NASA) has developed and is implementing a comprehensive program of research, technology development, and monitoring of the Earth's upper atmosphere, with emphasis on the upper troposphere and stratosphere. This program aims at expanding our chemical and physical understanding to permit both the quantitative analysis of current perturbations as well as the assessment of possible f...
Keywords: BIBLIOGRAPHIES; AERONAUTICAL ENGINEERING; INDEXES (DOCUMENTATION); DATA BASES
|SRAM Based Re-programmable FPGA for Space Applications - Wang, J. J.|
An SRAM (static random access memory)-based reprogrammable FPGA (field programmable gate array) is investigated for space applications. A new commercial prototype, named the RS family, was used as an example for the investigation. The device is fabricated in a 0.25 micrometers CMOS technology. Its architecture is reviewed to provide a better understanding of the impact of single event upset (SEU) on the device during operation...
Keywords: DATA BASES; LIBRARIES; DOCUMENTS; CONTRACTS; ORGANIZATIONS; SCHEDULES
|Ellington Field: A Short History, 1917-1962 - Carlson, Eri|
This document details the chronological history of an air field in Southeast Texas that currently serves as an adjunct to NASA Johnson Space Center as well as a civilian/military air field. The field was built early in the 20th century, soon after airplane flight became a recognized factor in American military applications, was central to a wide variety of military uses throughout this century, and remains viable for such purposes in addition to serving a vital role in NASA's training of astrona...
Keywords: AERONAUTICAL ENGINEERING; BIBLIOGRAPHIES; REPORTS; DATA BASES
|An Overview of Landing Gear Dynamics - Pritchard, Jocelyn I|
One of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years...
Keywords: DATA BASES; BIBLIOGRAPHIES; AERONAUTICAL ENGINEERING; SUPPLEMENTS; AERONAUTICS
|The chemistry of dense interstellar clouds - Irvine, W. M|
The basic theme of this program is the study of molecular complexity and evolution in interstellar and circumstellar clouds incorporating the biogenic elements. Recent results include the identification of a new astronomical carbon-chain molecule, C4Si. This species was detected in the envelope expelled from the evolved star IRC10216 in observations at the Nobeyama Radio Observatory in Japan. C4Si is the carrier of six unidentified lines which had previously been observed...
Keywords: DATA BASES; DATA PROCESSING; LOCAL AREA NETWORKS; MINICOMPUTERS; WORKSTATIONS
|1998 Calibration of the Mach 4.7 and Mach 6 Arc-Heated Scramjet Test Facility Nozzles - Witte, David W.|
A calibration of the Arc-Heated Scramjet Test Facility (AHSTF) Mach 4.7 and Mach 6 nozzles was performed in 1998. For each nozzle, three different typical facility operating test points were selected for calibration. Each survey consisted of measurements, at 340 separate locations across the 11 inch square nozzle exit plane, of pitot pressure, static pressure, and total temperature. Measurement density was higher (4/inch) in the boundary layer near the nozzle wall than in the core nozzle flow (1...
Keywords: COST ANALYSIS; INDEPENDENT VARIABLES; STATISTICAL ANALYSIS; DATA BASES; DEMAND (ECONOMICS)
|An implementation of a data definition facility for the Graphics language for Database. - Williamson, Michael L.|
Thesis advisor, C. Thomas Wu
Keywords: DATA BASES ; COMPUTER GRAPHICS; PROGRAMMING LANGUAGES; DATA MANAGEMENT
|Development and Ground Testing of a Compactly Stowed Scalable Inflatably Deployed Solar Sail - Lichodziejewski, David|
This paper discusses the solar sail design and outlines the interim accomplishments to advance the technology readiness level (TRL) of the subsystem from 3 toward a technology readiness level of 6 in 2005. Under Phase II of the program many component test articles have been fabricated and tested successfully. Most notably an unprecedented section of the conically deployed rigidizable sail support beam, the heart of the inflatable rigidizable structure, has been deployed and tested in the NASA Go...
Keywords: DATA BASES; PROJECT PLANNING; AEROSOLS; AUGMENTATION; COMPUTER PROGRAMS
|Perl Tools for Automating Satellite Ground Systems - McLean, David|
The freeware scripting language Pert offers many opportunities for automating satellite ground systems for new satellites as well as older, in situ systems. This paper describes a toolkit that has evolved from of the experiences gained by using Pert to automate the ground system for the Compton Gamma Ray Observatory (CGRO) and for automating some of the elements in the Earth Observing System Data and Operations System (EDOS) ground system at Goddard Space Flight Center (GSFC)...
Keywords: FAULT TREES; PROBABILITY THEORY; HAZARDS; BIBLIOGRAPHIES; RISK; DATA BASES; IDENTIFYING
|Coherent Doppler Wind Lidar Technology for Space Based Wind Measurements Including SPARCLE - Kavaya, Michael J.|
It has been over 30 years since coherent lidar systems first measured wind velocity, and over 20 years since the ''ultimate application'' of measuring Earth's winds from space was conceived. Coherent or heterodyne optical detection involves the combination (or mixing) of the returned optical field with a local oscillator (LO) laser's optical field on the optical detector. This detection technique yields the benefits of dramatically improved signal-to-noise ratios; insensitivity to detector noise...
Keywords: AEROSPACE MEDICINE; BIBLIOGRAPHIES; DATA BASES; WORDS (LANGUAGE); REPORTS
|Advanced Applications of Adifor 3.0 for Efficient Calculation of First-and Second-Order CFD Sensitivity Derivatives - Taylor, Arthur C., II|
This final report will document the accomplishments of the work of this project. 1) The incremental-iterative (II) form of the reverse-mode (adjoint) method for computing first-order (FO) aerodynamic sensitivity derivatives (SDs) has been successfully implemented and tested in a 2D CFD code (called ANSERS) using the reverse-mode capability of ADIFOR 3.0. These preceding results compared very well with similar SDS computed via a black-box (BB) application of the reverse-mode capability of ADIFOR ...
Keywords: DATA BASES; DATA MINING; COMPUTER PROGRAMS; COMMERCE; GENETICS; COLLECTION
|Experimental and Numerical Correlation of Gravity Sag in Solar Sail Quality Membranes - Black, Jonathan T.|
Solar sails are among the most studied members of the ultra-lightweight and inflatable (Gossamer) space structures family due to their potential to provide propellentless propulsion. They are comprised of ultra-thin membrane panels that, to date, have proven very difficult to experimentally characterize and numerically model due to their reflectivity and flexibility, and the effects of gravity sag and air damping...
Keywords: FLAMES; VORTICES; EXTINCTION; DATA BASES; GRAVITATIONAL EFFECTS; MICROGRAVITY
|A hybrid connectionist/AI architecture for reflexive, reflective, and exploratory systems - Myers, Michael H|
No Abstract Available
Keywords: NASA PROGRAMS; PROJECT MANAGEMENT; DATA BASES; FEDERAL BUDGETS
|Vandenberg Boundary Layer Survey (VBLS): final report - results - Skupniewicz, C. E.;Kamada, Ray.;McKay, L.|
Final report for period January 1988 - December 1988.
Keywords: ATMOSPHERIC PHYSICS; BOUNDARY LAYER FLOW; TOPOGRAPHY, DATA BASES
|Approach for Input Uncertainty Propagation and Robust Design in CFD Using Sensitivity Derivatives - Putko, Michele M.|
An implementation of the approximate statistical moment method for uncertainty propagation and robust optimization for quasi 3-D Euler CFD code is presented. Given uncertainties in statistically independent, random, normally distributed input variables, first- and second-order statistical moment procedures are performed to approximate the uncertainty in the CFD output. Efficient calculation of both first- and second-order sensitivity derivatives is required...
Keywords: DATA BASES; INTERNETS; OBJECT-ORIENTED PROGRAMMING; PERSONNEL; LAW (JURISPRUDENCE)
|Mars Spark Source Prototype Developed - Eichenberg, Dennis J.|
The Mars Spark Source Prototype (MSSP) hardware was developed as part of a proof of concept system for the detection of trace metals such as lead, cadmium, and arsenic in Martian dusts and soils. A spark discharge produces plasma from a soil sample, and detectors measure the optical emission from metals in the plasma to identify and quantify them. Trace metal measurements are vital in assessing whether or not the Martian environment will be toxic to human explorers...
Keywords: POTABLE WATER; CHEMICAL ANALYSIS; DATA BASES; ENVIRONMENT MANAGEMENT; INSULATION; SOILS
|The CERES S'COOL Project: Operational but not Routine - Chambers, Lin H.|
The first Clouds and the Earth's Radiant Energy System (CERES) instrument has been returning useful data on Earth's radiation budget from the Tropical Rainfall Measuring Mission (TRMM) spacecraft since late 1997. Validation of the initial data is now intensively underway. As one component of this validation, the CERES Students Cloud Observations On-Line (S'COOL) project has been operational since April 1998 - the 2nd CERES validation month...
Keywords: ACCIDENT INVESTIGATION; COMPUTER PROGRAMS; DATA BASES; SPACE SHUTTLES; DAMAGE; RECOMMENDATIONS
|Filler Wire Development for 2195 Aluminum-Lithium - Bjorkman, Gerry|
The presentation outline summarizes activities supporting the development of filler wire for 215 aluminum-lithium. The specific objective of the research was to identify an Al-Cu based filler wire chemistry which reduces weld susceptibility in 2195 Aluminum-Lithium welds and repairs welds along with providing adequate mechanical properties. This report is in viewgraph form.
Keywords: AEROSPACE MEDICINE; BIBLIOGRAPHIES; DATA BASES; DOCUMENTATION; BIOLOGICAL EFFECTS
|Standards Development Activities at White Sands Test Facility - Baker, D. L.|
The development of standards and standard activities at the JSC White Sands Test Facility (WSTF) has been expanded to include the transfer of technology and standards to voluntary consensus organizations in five technical areas of importance to NASA. This effort is in direct response to the National Technology Transfer Act designed to accelerate transfer of technology to industry and promote government-industry partnerships...
Keywords: SOLVENTS; GLOVES; GRAVIMETRY; POLYETHYLENES; POLYURETHANE RESINS; DATA BASES; LATEX
|Observational Studies of the Clearing Phase in Proto-Planetary Disks Surrounding Intermediate Mass Stars - Grady, Carol A|
A detailed study of circumstellar gas associated with young, intermediate-mass stars has demonstrated that, far from being unique or an infrequently occurring phenomenon, beta Pic-like infall activity is routinely observed in stars younger than 10-50 Myr when the observer's line of sight lies within 15 degrees of the disk mid-plane. Detailed studies of 2 Herbig Ae/Be stars, AB Aur and HD 163296 demonstrate that enhanced infall episodes last 20-60 hours, comparable to the duration of similar epis...
Keywords: AEROSPACE MEDICINE; DATA BASES; BIOLOGY; BIBLIOGRAPHIES; REPORTS; SUPPLEMENTS
|Complete Galilean-Invariant Lattice BGK Models for the Navier-Stokes Equation - Qian, Yue-Hong|
Galilean invariance has been an important issue in lattice-based hydrodynamics models. Previous models concentrated on the nonlinear advection term. In this paper, we take into account the nonlinear response effect in a systematic way. Using the Chapman-Enskog expansion up to second order, complete Galilean invariant lattice BGK models in one dimension (theta = 3) and two dimensions (theta = 1) for the Navier-Stokes equation have been obtained.
Keywords: CONSTANTS; CREEP RUPTURE STRENGTH; PROCEDURES; ISOTHERMAL PROCESSES; DATA BASES; OPTIMIZATION
|Crash Simulation of a Boeing 737 Fuselage Section Vertical Drop Test - Fasanella, Edwin L.|
A 30-ft/s vertical drop test of a fuselage section of a Boeing 737 aircraft was conducted in October of 1999 at the FAA Technical Center in Atlantic City, NJ. This test was performed to evaluate the structural integrity of a conformable auxiliary fuel tank mounted beneath the floor and to determine its effect on the impact response of the airframe structure and the occupants. The test data were used to compare with a finite element simulation of the fuselage structure and to gain a better unders...
Keywords: WINGS; ANGLE OF ATTACK; VORTICES; DATA BASES; AIRFOILS; HYSTERESIS; DATA
|Nonstationary Gas Flow in Thin Pipes of Variable Cross Section - Guderley, G|
Characteristic methods for nonstationary flows have been published only for the special case of the isentropic flow up until the present, althought they are applicable in various places to more difficult questions too. This report derives the characteristic method for the flows which depend only on the position coordinates and time. At the same time the treatment of compression shocks is shown.
Keywords: COMMERCIAL AIRCRAFT; HYDROCARBONS; AIRCRAFT FUELS; AIRCRAFT DESIGN; DATA BASES
|A version and configuration model for software evolution - Badr, Salah M.;Luqi.|
Keywords: CONFIGURATIONS; DATA BASES; JOB ANALYSIS; DATA MANAGEMENT; SOFTWARE ENGINEERING
|Inorganic crystal structure database (ICSD) and standardized data and crystal chemical characterization of inorganic structure types (TYPIX) - Two tools for inorganic chemists and crystallographers (Volume 101) - Fluck, E.|
Journal of Research of the National Institute of Standards and Technology
Keywords: compare; RETRIEVE; ICSD; inorganic structure data bases; LAZY PULVERIX
|Measured and Simulated Dark J-V Characteristics of a-Si:H Single Junction p-i-n Solar Cells Irradiated with 40 keV Electrons - Lord, Kenneth|
The effect of 40 keV electron irradiation on a-Si:H p-i-n single-junction solar cells was investigated using measured and simulated dark J-V characteristics. EPRI-AMPS and PC-1D simulators were explored for use in the studies. The EPRI-AMPS simulator was employed and simulator parameters selected to produce agreement with measured J-V characteristics. Three current mechanisms were evident in the measured dark J-V characteristics after electron irradiation, namely, injection, shunting and a term ...
Keywords: DATA BASE MANAGEMENT SYSTEMS; RELATIONAL DATA BASES; DOCUMENTS
|Revolutionary Concepts for Human Outer Planet Exploration (HOPE) - Troutman, Patrick A.|
This paper summarizes the content of a NASA-led study performed to identify revolutionary concepts and supporting technologies for Human Outer Planet Exploration (HOPE). Callisto, the fourth of Jupiter's Galilean moons, was chosen as the destination for the HOPE study. Assumptions for the Callisto mission include a launch year of 2045 or later, a spacecraft capable of transporting humans to and from Callisto in less than five years, and a requirement to support three humans on the surface for a ...
Keywords: MAGNETIC STORMS; DATA BASES; PLASMA LAYERS; CRRES (SATELLITE); EARTH MAGNETOSPHERE
|Thermopile Detector Arrays for Space Science Applications - Foote, M. C.|
Thermopile detectors are widely used in uncooled applications where small numbers of detectors are required, particularly in low-cost commercial applications or applications requiring accurate radiometry. Arrays of thermopile detectors, however, have not been developed to the extent of uncooled bolometer and pyroelectric/ferroelectric arrays. Efforts at JPL seek to remedy this deficiency by developing high performance thin-film thermopile detectors in both linear and two-dimensional formats...
Keywords: COMPILERS; DATA BASES; PARALLEL PROCESSING (COMPUTERS); PROBLEM SOLVING; PROGRESS; THREADS
|Observing Tropospheric Ozone From Space - Fishman, Jac|
The importance of tropospheric ozone embraces a spectrum of relevant scientific issues ranging from local environmental concerns, such as damage to the biosphere and human health, to those that impact global change questions, Such is climate warming. From an observational perspective, the challenge is to determine the tropospheric ozone global distribution. Because its lifetime is short compared with other important greenhouse gases that have been monitored over the past several decades, the dis...
Keywords: DATA BASES; COMPUTER INFORMATION SECURITY; SPACE COMMUNICATION; INTERNETS; MAINTENANCE; MIGRATION
|The World At Your Keyboard|
Wide Area Information Servers Project Documentation, Scanned and uploaded in 2013.
Keywords: WAIS; Internet History; Data Bases; Kevin Tiene; Harvey Lehtman
|Joint Winter Runway Friction Program Accomplishments - Yager, Thomas J.|
The major program objectives are: (1) harmonize ground vehicle friction measurements to report consistent friction value or index for similar contaminated runway conditions, for example, compacted snow, and (2) establish reliable correlation between ground vehicle friction measurements and aircraft braking performance. Accomplishing these objectives would give airport operators better procedures for evaluating runway friction and maintaining acceptable operating conditions, providing pilots info...
Keywords: DATA MANAGEMENT; PROTOCOL (COMPUTERS); DOCUMENTS; LIBRARIES; DATA BASES
|A Coupled Plasma and Sheath Model for High Density Reactors - Deepak, Bose|
We present a coupled plasma and collisionless; sheath model for the simulation of high density plasma processing reactors. Due to inefficiencies in numerical schemes and the resulting computational burden, a coupled multidimensional plasma and sheath simulation has not been possible model for gas mixtures and high density reactors of practical interest. In this work we demonstrate that with a fully implicit algorithm and a refined computational mesh, a self-consistent plasma and sheath simulatio...
Keywords: AEROSPACE MEDICINE; SPACE FLIGHT; CONFERENCES; EDUCATION; HEALTH; RISK; STANDARDIZATION; DATA BASES; EXPOSURE; PERSONNEL
|Gas chromatographic concepts for the analysis of planetary atmospheres - Valentin, J. R.|
Over the last few years, new gas chromatographic (GC) concepts were developed for use on board spacecraft or any other restricted environments for determining the chemical composition of the atmosphere and surface material of various planetary bodies. Future NASA Missions include an entry probe that will be sent to Titan and various spacecraft that will land on Mars. In order to be able to properly respond to the mission science requirements and physical restrictions imposed on the instruments b...
Keywords: DATA ACQUISITION; LATITUDE; LONGITUDE; QUALITY CONTROL; DATA BASES; EXTINCTION; FOSSILS; GEOGRAPHY; GEOLOGY; INVERTEBRATES; PALEOBIOLOGY; BIOLOGICAL EVOLUTION
|A Catalog of Soft X-Ray Shadows, and More Contemplation of the 1/4 KeV Background - Snowden, S. L.|
This paper presents a catalog of shadows in the 1/4 keV soft X-ray diffuse background 4 (SXRB) that were identified by a comparison between ROSAT All-Sky Survey maps and DIRB&corrected IRAS 100 micron maps. These ''shadows'' are the negative correlations between the surface brightness of the SXRB and the column density of the Galactic interstellar medium (ISIM) over limited angular regions (a few degrees in extent)...
Keywords: SYSTEMS ENGINEERING; DATA MANAGEMENT; BIBLIOGRAPHIES; DATA BASES; PROTOTYPES; INTERNETS; SUBROUTINE LIBRARIES (COMPUTERS)